论文标题
量子控制的经典耗散成本
Classical dissipative cost of quantum control
论文作者
论文摘要
非绝热量子控制的协议通常需要使用经典时间变化的字段。但是，评估此类方案的热力学成本远非微不足道。在这封信中，我们研究了由经典设备生成控制场产生的不可逆熵，从而在控制方案的成本和耗散之间提供了直接联系。我们尤其将重点放在时间相关的磁场和绝热性的捷径上。我们的结果通过两个实验可实现的案例研究来展示：磁场中的自旋1/2粒子的Landau-Zener模型和限制在笔架陷阱中的离子。
Protocols for non-adiabatic quantum control often require the use of classical time varying fields. Assessing the thermodynamic cost of such protocols, however, is far from trivial. In this letter we study the irreversible entropy produced by the classical apparatus generating the control fields, thus providing a direct link between the cost of a control protocol and dissipation. We focus, in particular, on the case of time-dependent magnetic fields and shortcuts to adiabaticity. Our results are showcased with two experimentally realisable case studies: the Landau-Zener model of a spin-1/2 particle in a magnetic field and an ion confined in a Penning trap.
